US10337413B2 - Flow limiter - Google Patents

Flow limiter Download PDF

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Publication number
US10337413B2
US10337413B2 US15/563,908 US201615563908A US10337413B2 US 10337413 B2 US10337413 B2 US 10337413B2 US 201615563908 A US201615563908 A US 201615563908A US 10337413 B2 US10337413 B2 US 10337413B2
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United States
Prior art keywords
pipe
fluid
flow limiter
intake
circulation direction
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US15/563,908
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English (en)
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US20180119620A1 (en
Inventor
Damien FALGAREIRO
Elisa BARITEAU
Elise THORY
Pascal RIZZO
Alexis LONGIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Helicopter Engines SAS
Original Assignee
Safran Helicopter Engines SAS
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Publication of US20180119620A1 publication Critical patent/US20180119620A1/en
Assigned to SAFRAN HELICOPTER ENGINES reassignment SAFRAN HELICOPTER ENGINES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARITEAU, Elisa, FALGAREIRO, Damien, LONGIN, Alexis, RIZZO, Pascal, THORY, Elise
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/22—Fuel supply systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/22—Fuel supply systems
    • F02C7/222—Fuel flow conduits, e.g. manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
    • F02C9/26—Control of fuel supply
    • F02C9/32—Control of fuel supply characterised by throttling of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • F15D1/025—Influencing flow of fluids in pipes or conduits by means of orifice or throttle elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02772—Throttle passages using spirally or helically shaped channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/25—Three-dimensional helical

Definitions

  • the invention relates to fluid flow limiting devices, and in particular those installed in an engine of a turbomachine of an aircraft.
  • Flow limiting devices are conventionally used to limit and thereby control a fluid collected from a main circuit.
  • these solutions include retention zones which can cause coking problems in these zones.
  • the invention proposes to mitigate at least one of these disadvantages.
  • the invention proposes a flow limiter comprising a body comprising a fluid intake and a fluid outlet; body in which is arranged a fluid circulation pipe comprising a succession of chambers of different cross-sections connected with the fluid intake on the one hand and with the fluid outlet on the other hand, the pipe having a generally tubular shape, the pipe having a bottom having a regular curve so that the pipe does not have any area(s) retaining the fluid circulating in the pipe.
  • the limiter is obtained by an additive manufacturing process.
  • the additive manufacturing process is of the laser powder-melting type.
  • the powder is preferably metallic, typically Hastelloy X, based on nickel or aluminum, type AS7G06.
  • the pipe has the shape of a helix.
  • the pipe is a succession of assemblies each comprising: a main cylindrical chamber having a first cross-section followed by a first secondary chamber and a cylindrical sprinkler having a second cross-section followed by a second secondary chamber.
  • the main chamber, the sprinkler, the first and second secondary chambers sharing a common generatrix so that the bottom of the pipe is a regular helical curve.
  • the first secondary chamber has a frustoconical shape and is convergent in the fluid circulation direction; the second secondary chamber has a frustoconical shape and is divergent in the fluid circulation direction.
  • the limiter comprises a strainer connected with the fluid intake arranged downstream of the fluid intake in the fluid circulation direction.
  • the limiter comprises a strainer connected with the fluid outlet arranged upstream of the fluid outlet in the fluid circulation direction.
  • the invention also relates to a fuel circuit of an aircraft turbine engine comprising at least one flow limiter according to the invention.
  • FIG. 1 illustrates an overview of a flow limiter according to a first embodiment
  • FIG. 2 illustrates an overview of a flow limiter according to a second embodiment
  • FIG. 3 illustrates a view of the intake of the flow limiter
  • FIG. 4 illustrates a view of the outlet of the flow limiter
  • FIG. 5 illustrates a view of the pipe of the flow limiter
  • FIG. 6 illustrates an overview of a device for manufacturing a flow limiter.
  • FIGS. 1 and 2 illustrate a flow limiter comprising a body 1 comprising a fluid intake 2 and a fluid outlet 3 .
  • a fluid entering into the limiter circulates from the intake 2 toward the outlet 3 (arrow F in FIGS. 1 and 2 ).
  • the body 1 has a generally cylindrical or frustoconical shape with an outside surface which is not necessarily regular.
  • the intake 2 consists of a cylinder arranged in the body 1 which is in fluid connection with a pipe 5 .
  • a strainer 4 is positioned directly downstream of the intake 2 of the limiter in the fluid circulation direction (see FIG. 3 ). This is a grid arranged at the intake 2 , the strainer 4 being in fluid connection with the pipe 5 .
  • the strainer 4 allows the entering fluid to be filtered to avoid having impurities penetrate into the pipe 5 situated downstream of the strainer 4 .
  • the strainer 4 can be positioned at the outlet 3 of the limiter (not shown).
  • the strainer 4 is preferably in the form of a cone comprising several holes 6 , preferably of identical size. Other shapes are conceivable however.
  • the pipe 5 is arranged in the body 1 between the intake 2 and the outlet 3 (see FIGS. 1 and 2 and FIG. 4 ), and has a generally tubular shape and has a bottom having a regular curve so that the pipe 5 does not have area(s) retaining the fluid in circulation in the pipe 5 .
  • the pipe 5 comprises a succession of chambers 7 , 8 , 9 , 10 with different cross sections (see FIG. 5 ).
  • sprinklers 9 there is a succession of sprinklers 9 positioned between the main chambers 7 with a larger cross-section, the sprinklers 9 being connected with the main chambers 7 through secondary chambers 8 , 10 of frustoconical shape, with a convergent shape for that upstream of the sprinkler 9 , in the fluid circulation direction, and with a divergent form for that downstream of the sprinkler 9 , in the fluid circulation direction.
  • the succession of sprinkles makes it possible to provide a component equivalent to a single sprinkler with a small flow area, while reducing the risk of blockage (pollutant particle which can block a small sprinkler but passes freely through larger flow areas) and reduces sensitivity to aeration/cavitation of the fluid passing through it.
  • the pipe 5 is preferably in the shape of a circular helix (see FIG. 5 ).
  • the helical shape of the pipe makes it possible to have more sprinklers than if it were straight, within a given usable space.
  • the radius of the helix depends on the size of the body 1 and on the cross-section of the chambers of the pipe 5 .
  • the pipe 5 therefore has a slope which allows the circulation of the fluid in the limiter.
  • the limiter is oriented so that gravity (arrow G in FIGS. 1 and 2 ) guarantees the absence of a lower dead point, that is areas of the pipe which could lead to retention of the fluid in circulation in the pipe.
  • the pipe 5 is a succession of assemblies E each comprising: a cylindrical main chamber 7 having a first cross-section, followed by a secondary chamber 8 and a cylindrical sprinkler 9 having a second cross-section, followed by a second secondary chamber 10 .
  • the first secondary chamber and the second secondary chamber have a frustoconical shape.
  • the first secondary chamber has a frustoconical shape, with a convergent shape for that upstream of the sprinkler 9 in the fluid circulation direction, and with a divergent shape for that downstream of the sprinkler 9 in the fluid circulation direction.
  • main chamber, the first and the second secondary chamber and the sprinkler share a common generator, so that the bottom of the pipe is a regular helical curve.
  • the sprinklers 9 are located in the lower portion. In addition, between the different chambers there is always a regular sloe without changes or breaks thereof. Thus, the bottom of the pipe 5 is always continuous.
  • the flow limiter has an external diameter of the pipe D comprised between 10 and 20 mm, an internal diameter d comprised between 5 and 10 mm and a height h comprised between 15 and 30 mm.
  • the limiter above is preferably obtained by manufacturing means using material addition, additive manufacturing, of the selective laser powder-melting type.
  • the powder is preferably metallic, typically Hastelloy X, based on nickel or aluminum, type AS7G06.
  • the powder can also be composed of plastic.
  • the Laser which is a high-energy beam capable of locally melting the powder for the purpose of building a part layer by layer.
  • FIG. 6 illustrates a material-adding manufacturing device of the selective laser powder-melting type.
  • the device comprises a powder feed reservoir 20 which is movable, a system 21 for spreading the powder bed brings the powder to a movable construction platform 22 which rises progressively as the part 23 (the limiter) is manufactured.
  • a powder recovery reservoir 24 is used to recover the powder that is not used.
  • Manufacturing occurs in a controlled atmosphere to allow laser melting.
  • the manufacturing device comprises an atmosphere control system 25 .
  • the manufacturing device comprises a laser source 26 and an optical system 27 which makes it possible to direct the laser beam to the construction platform 22 .
  • the part 23 is manufactured by a succession of layers of tens of microns.
  • An energy source 26 of the laser type, selectively melts the layers of powder one by one according to the 3D design model.
  • This method allows parts to be manufactured that cannot be created by removing material.
  • the various elements constituting the limiter do not consist of a complex assembly which could be improved in any case and could cause inaccuracies in assembly and consequently create slope breaks in the pipe in particular.
  • Additive manufacturing makes it possible to generate the limiter progressively by growing the structure of the limiter.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Powder Metallurgy (AREA)
  • Pipe Accessories (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Laser Beam Processing (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
US15/563,908 2015-04-03 2016-03-31 Flow limiter Active 2036-07-03 US10337413B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1552882A FR3034466B1 (fr) 2015-04-03 2015-04-03 Limiteur de debit
FR1552882 2015-04-03
PCT/FR2016/050717 WO2016156740A1 (fr) 2015-04-03 2016-03-31 Limiteur de débit

Publications (2)

Publication Number Publication Date
US20180119620A1 US20180119620A1 (en) 2018-05-03
US10337413B2 true US10337413B2 (en) 2019-07-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US15/563,908 Active 2036-07-03 US10337413B2 (en) 2015-04-03 2016-03-31 Flow limiter

Country Status (10)

Country Link
US (1) US10337413B2 (fr)
EP (1) EP3277941B1 (fr)
JP (1) JP6879930B2 (fr)
KR (1) KR20170134565A (fr)
CN (1) CN107438708B (fr)
CA (1) CA2981540C (fr)
FR (1) FR3034466B1 (fr)
PL (1) PL3277941T3 (fr)
RU (1) RU2704590C2 (fr)
WO (1) WO2016156740A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12044410B2 (en) 2020-02-24 2024-07-23 Safran Helicopter Engines Integral flow rate limiter and fuel injector for a gas turbine combustor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9498246B2 (en) 2013-03-14 2016-11-22 Saphena Medical, Inc. Unitary endoscopic vessel harvesting devices
CN108052127A (zh) * 2017-12-08 2018-05-18 周宝龙 一种特殊的卡合紧密型液体流量控制结构
CN107943115A (zh) * 2017-12-08 2018-04-20 周宝龙 一种特殊的卡合装配型液体流量控制结构
US10758981B2 (en) * 2018-07-17 2020-09-01 Honeywell International Inc. Additively-manufactured flow restrictors and methods for the fabrication thereof
CN109505830B (zh) * 2018-11-28 2021-12-03 中国核电工程有限公司 一种非能动非线性流体阻力元件
CN110030454B (zh) * 2019-04-11 2020-08-04 南通大学 一种房屋建筑排水系统用减能器
CN112983652B (zh) * 2021-03-12 2022-09-02 广州大学城华电新能源有限公司 一种燃气轮机进气控制系统
FR3129450B1 (fr) * 2021-11-22 2024-01-19 Safran Trans Systems Raccord fluidique en particulier pour boite d’engrenages de turbomachine d’aeronef

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT207642B (de) 1957-12-13 1960-02-10 Seidl Karl Durchflußmengen-Regelvorrichtung, insbesondere für Verwendung in Druckwasserleitungen
US3323550A (en) 1964-05-21 1967-06-06 Lee Co Fluid resistor
US3459407A (en) * 1967-02-15 1969-08-05 Austin Motor Co Ltd The Devices for mixing liquids
US3983903A (en) 1974-12-23 1976-10-05 Combustion Engineering, Inc. Multiple orifice assembly
US4053141A (en) * 1974-08-02 1977-10-11 Siemens Aktiengesellschaft Static mixer for flowing media
US4534659A (en) * 1984-01-27 1985-08-13 Millipore Corporation Passive fluid mixing system
US5505229A (en) * 1993-07-12 1996-04-09 The Lee Company Fluid resistor
US7080937B1 (en) * 2003-11-13 2006-07-25 Automatic Bar Controls, Inc. Nonclogging static mixer
US20100089689A1 (en) * 2007-03-08 2010-04-15 Ho-Young Cho Silencer for pneumatic device
US20100163651A1 (en) 2008-12-31 2010-07-01 Feith Raymond P Low Flow Irrigation Emitter
US9597732B2 (en) * 2015-01-26 2017-03-21 Honeywell International Inc. Flow restrictor assemblies including a monolithic flow restrictor and methods for manufacturing the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU509754A1 (ru) * 1972-11-29 1976-04-05 Предприятие П/Я А-7755 Винтовой регулируемый дроссель
US4602479A (en) * 1985-06-12 1986-07-29 United Technologies Corporation Fuel control
SG46692A1 (en) * 1992-03-30 1998-02-20 Telstra Corp Ltd A cryptographic communications method and system
US8826938B2 (en) * 2008-01-22 2014-09-09 Control Components, Inc. Direct metal laser sintered flow control element
US8961114B2 (en) * 2010-11-22 2015-02-24 General Electric Company Integrated variable geometry flow restrictor and heat exchanger
US8916085B2 (en) * 2011-06-02 2014-12-23 A. Raymond Et Cie Process of making a component with a passageway
NO336835B1 (no) * 2012-03-21 2015-11-16 Inflowcontrol As Et apparat og en fremgangsmåte for fluidstrømstyring
EP2700459B1 (fr) * 2012-08-21 2019-10-02 Ansaldo Energia IP UK Limited Procédé de fabrication d'un article tridimensionnel

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT207642B (de) 1957-12-13 1960-02-10 Seidl Karl Durchflußmengen-Regelvorrichtung, insbesondere für Verwendung in Druckwasserleitungen
US3323550A (en) 1964-05-21 1967-06-06 Lee Co Fluid resistor
US3459407A (en) * 1967-02-15 1969-08-05 Austin Motor Co Ltd The Devices for mixing liquids
US4053141A (en) * 1974-08-02 1977-10-11 Siemens Aktiengesellschaft Static mixer for flowing media
US3983903A (en) 1974-12-23 1976-10-05 Combustion Engineering, Inc. Multiple orifice assembly
US4534659A (en) * 1984-01-27 1985-08-13 Millipore Corporation Passive fluid mixing system
US5505229A (en) * 1993-07-12 1996-04-09 The Lee Company Fluid resistor
US7080937B1 (en) * 2003-11-13 2006-07-25 Automatic Bar Controls, Inc. Nonclogging static mixer
US20100089689A1 (en) * 2007-03-08 2010-04-15 Ho-Young Cho Silencer for pneumatic device
US20100163651A1 (en) 2008-12-31 2010-07-01 Feith Raymond P Low Flow Irrigation Emitter
US9597732B2 (en) * 2015-01-26 2017-03-21 Honeywell International Inc. Flow restrictor assemblies including a monolithic flow restrictor and methods for manufacturing the same

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
International Preliminary Report on Patentability issued for PCT Application No. PCT/FR2016/050717, dated Oct. 12, 2017, 15 pages (8 pages of English Translation and 7 pages of original document).
International search report and written opinion issued for PCT Application No. PCT/FR2016/050717, dated Jul. 20, 2016, 18 pages (8 pages of English Translation and 10 pages of Original document).
Preliminary Research Report received for French Application No. 1552882, dated Feb. 3, 2016, 3 pages (1 page of French Translation Cover Sheet and 2 pages of original document).

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12044410B2 (en) 2020-02-24 2024-07-23 Safran Helicopter Engines Integral flow rate limiter and fuel injector for a gas turbine combustor

Also Published As

Publication number Publication date
KR20170134565A (ko) 2017-12-06
RU2017138148A3 (fr) 2019-09-25
JP2018519181A (ja) 2018-07-19
US20180119620A1 (en) 2018-05-03
EP3277941A1 (fr) 2018-02-07
CN107438708B (zh) 2019-04-12
CA2981540A1 (fr) 2016-10-06
RU2704590C2 (ru) 2019-10-29
PL3277941T3 (pl) 2019-06-28
JP6879930B2 (ja) 2021-06-02
EP3277941B1 (fr) 2019-02-20
RU2017138148A (ru) 2019-05-06
CN107438708A (zh) 2017-12-05
FR3034466B1 (fr) 2018-03-16
CA2981540C (fr) 2023-03-14
WO2016156740A1 (fr) 2016-10-06
FR3034466A1 (fr) 2016-10-07

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